Patents by Inventor Seigo Sakagami

Seigo Sakagami has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Viscoelastic characteristic value-measuring apparatus and method of measuring viscoelastic characteristic value
    Patent number: 7024922
    Abstract: A viscoelastic characteristic value-measuring apparatus, using a split Hopkinson's bar, having an impact bar, input bar, and an output bar. The input bar has a first strain gauge and a second strain gauge. The output bar has a third strain gauge and a fourth strain gauge. The input bar and the output bar are made of a viscoelastic material, and a specimen is in between the input bar and the output bar. The length of said output bar is set to a range from 500 mm to 2500 mm both inclusive. The length of said input bar is set to a range from 1500 mm to 2500 mm both inclusive.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: April 11, 2006
    Assignees: SRI Sports Limited
    Inventors: Noritoshi Nakagawa, Yasuhisa Sekiguchi, Kiyoto Maruoka, Jun Nishibayashi, Seigo Sakagami, Hiroshi Yoshinaga, Kaname Yamada
  • Golf ball
    Patent number: 6688992
    Abstract: A golf ball superior in resilience performance, cut resistance and spin performance is provided. The golf ball is composed of a core and a cover surrounding the core. The cover is formed of a composition having 0.5-20 parts by weight of organic short fiber blended with respect to 100 parts by weight of a polymer component having thermoplastic elastomer as its main component. Thermoplastic resin may also be blended in the polymer component. The cover composition has a flexural rigidity of 80-300 MPa, and the cover surface has a Shore D hardness of 41-56.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: February 10, 2004
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Kohei Takemura, Seigo Sakagami
  • Golf ball
    Publication number: 20020045501
    Abstract: A golf ball superior in resilience performance, cut resistance and spin performance is provided. The golf ball is composed of a core and a cover surrounding the core. The cover is formed of a composition having 0.5-20 parts by weight of organic short fiber blended with respect to 100 parts by weight of a polymer component having thermoplastic elastomer as its main component. Thermoplastic resin may also be blended in the polymer component. The cover composition has a flexural rigidity of 80-300 MPa, and the cover surface has a Shore D hardness of 41-56.
    Type: Application
    Filed: August 24, 2001
    Publication date: April 18, 2002
    Inventors: Kohei Takemura, Seigo Sakagami
  • Golf ball
    Publication number: 20020045499
    Abstract: A golf ball is provided which exhibits good rebound performance, long flight distance and favorable anti-flier characteristics and is excellent in hit feeling and controllability. The golf ball is composed of a core and a cover surrounding the core. The cover is formed by vulcanizing a cover composition including thermoplastic elastomer, trans structure-containing rubber and ionomer resin.
    Type: Application
    Filed: August 14, 2001
    Publication date: April 18, 2002
    Inventors: Kohei Takemura, Seigo Sakagami